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 County results Pressler: 40–50% 50–60% 60–70% 70–80% Muenster: 40–50% 50–60% | |||||||||||||||||
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| Elections in South Dakota | ||||||||||||||||
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The1990 United States Senate election in South Dakota was held on November 6, 1990. IncumbentRepublican U.S. SenatorLarry Pressler ran for re-election to a third term, beating Democratic nomineeTheodore 'Ted' Muenster by 19,000 votes. This was the last time until2014 that a Republican would be elected to South Dakota's Class 2 Senate seat.
| Party | Candidate | Votes | % | ±% | |
|---|---|---|---|---|---|
| Republican | Larry Pressler (incumbent) | 135,682 | 52.39% | −22.1% | |
| Democratic | Theodore 'Ted' Muenster | 116,727 | 45.07% | +19.56% | |
| Independent | Dean L. Sinclair | 6,567 | 2.54% | N/A | |
| Majority | 18,955 | 7.32% | −41.66% | ||
| Turnout | 258,976 | 61.6% | −9.7% | ||
| Republicanhold | Swing | ||||
